zfs loader: allow access to any filesystem in a pool

[Philipp Wuensche]

Andriy Gapon wrote:
> This is a ZFS boot patch that I would like to present you for review and testing:
> http://people.freebsd.org/~avg/zfsboot.diff
> 
> Currently in zfsloader you can only switch between pools, but you can only
> access one predetermined filesystem within a pool - wither root dataset of a
> pool or a filesystem pointed to by bootfs pool property.
> With this patch it is possible to access any filesystem in a pool and, thus, to
> boot kernel and modules from an alternative filesystem.  This is another
> stepping stone in so called Boot Environments support.

This is great, exactly what I need for my Boot Environment stuff:
http://anonsvn.h3q.com/projects/freebsd-patches/wiki/manageBE

greetings,
philipp